Hi everybody. On Thursday, I traveled to Pittsburgh for the White House Frontiers Conference,大家好 ...

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That's what you'll see inside. 这就是你在博物馆会看到的。You'll see it in the shackles of an enslave ...

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Effective on January 1st, federal contractors will be required to give their employees working on ne ...

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Weekly Address: Coming Together to Find Solutions奥巴马每周电视演讲：共同寻找解决方案The White House ...

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Although I didn't know the five police officers who were killed, or the seven who were wounded in Da ...

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Weekly Address: Protecting the Progress We've Made with Wall Street Reform奥巴马每周电视演讲：维护华 ...

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WeeklyAddress: It's Time to Fill the Vacancy on the Supreme Court奥巴马每周电视演讲：是填补最高法院 ...

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That's why it's so backward when some folks choose to stick their heads in the sand about basic scie ...

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Every four years, our nation's attention turns to a competition that's as heated as it is historic. ...

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Hi, everybody. One of the most urgent challenges of our time is climate change.大家好。当代最紧迫的 ...

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In our Olympians, we recognize that no one accomplishes greatness alone.奥运会让我们认识到，没有人单 ...

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We've got basketball players who stand nearly seven feet tall and a gymnast who's 4-foot-8.我们有近 ...

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Over 100 cars, SUVs, and pick-up trucks on the market today already meet our vehicles standards ahea ...

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Hi everybody. Earlier this summer, Michelle, Malia, Sasha and I headed west—to the national parks a ...

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We're revitalizing a grove of giant Sequoias in Yosemite; repairing the Lincoln Memorial;我们将重新 ...

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We took that step because we have a responsibility to protect the American people. But that's not a ...

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Earlier this year, I got a letter from a South Carolina woman named Ashley, who was expecting her th ...

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That includes using condoms properly.包括正确使用避孕套。If you live in or travel to an area where Z ...

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I agree. We need more Republicans to act that way because this is more important than politics.说得 ...

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Hello, everybody. This past week, we lost an American icon and one of the most influential figures o ...

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